patches/gcc/4.2.4/230-libbackend_dep_gcov-iov.h.patch
author "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Tue Dec 13 23:32:39 2011 +0100 (2011-12-13)
branch1.13
changeset 2847 c0bf2319af08
parent 687 b2b6b1d46aa1
permissions -rw-r--r--
scripts: fix dumping execution backtrace

Dumping the backtrace has been broken since changeset #652e56d6d35a:
scripts: execute each steps in a subshell

We can spawn sub-sub-shells in some cases.

The way the fault handler works is to dump the backtrace, but to avoid
printing it once for every sub-shell (which could get quite confusing),
it simply exits when it detects that it is being run in a sub-shell,
leaving to the top-level shell the work to dump the backtrace.

Because each step is executed in its own sub-shell, the variable arrays
that contain the step name, the source file and line number, are lost
when exiting the per-step sub-shell.

Hence, the backtrace is currently limited to printing only the top-level
main procedure of the shell.

Fix this thus:
- when dumping the bckatraces for the steps & the functions, remember
it was dumped, and only dump it if it was not already dumped
- at the top-level shell, print the hints

Also, rename the top-level step label.

Reported-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
(transplanted from 4193d6e6a17430a177fa88c287879c2c35e319f3)
     1 diff -durN gcc-4.2.1.orig/gcc/Makefile.in gcc-4.2.1/gcc/Makefile.in
     2 --- gcc-4.2.1.orig/gcc/Makefile.in	2007-05-31 17:37:38.000000000 +0200
     3 +++ gcc-4.2.1/gcc/Makefile.in	2007-08-03 20:36:14.000000000 +0200
     4 @@ -2660,7 +2660,7 @@
     5  # FIXME: writing proper dependencies for this is a *LOT* of work.
     6  libbackend.o : $(OBJS-common:.o=.c) $(out_file) \
     7    insn-config.h insn-flags.h insn-codes.h insn-constants.h \
     8 -  insn-attr.h  $(DATESTAMP) $(BASEVER) $(DEVPHASE)
     9 +  insn-attr.h  $(DATESTAMP) $(BASEVER) $(DEVPHASE) gcov-iov.h
    10  	$(CC) $(ALL_CFLAGS) $(ALL_CPPFLAGS) \
    11  	  -DTARGET_NAME=\"$(target_noncanonical)\" \
    12  	  -DLOCALEDIR=\"$(localedir)\" \